Ooooh the fun begins .........the beeatch has sent me some request via Faceache with a vile message attached
Permission to rip the hag to pieces please
Oh dear.
Growler is right on this one (not that he always isn't, cunningly slipped in double negative there you notice) If/when the Bitch from Hell (TBFH) rocks up at your place of work or your home plod need to be involved straight away. Restraining Order needs to be in place ASAP.
Re the FB 'stuff' I would try not to respond and just report her actions, report her with each abusive message that she sends. You not responding to her will have a far greater effect than anything else that you can do, other than killing her of course.
We will give you an alibi and say you woz 'ere all the time.